Star · F0III
12 Tri
12 Tri is a giant star of spectral type F0III in the constellation Triangulum, 159.8 light-years from the Sun.
| Other names | HIP 11486 |
|---|---|
| Constellation | Triangulum |
| Distance | 159.8 light-years (49.0 pc) |
| Apparent magnitude | magnitude 5.29 |
| Absolute magnitude | magnitude 1.84 |
| Spectral type | F0III |
| Surface temperature | 7,390 K |
| Luminosity | 15.8 L☉ |
| Radius | 2.43 R☉ |
| Mass | 2 M☉ (estimated) |
| Right ascension (J2000) | 2h 28m 10.0s |
| Declination (J2000) | +29° 40′ 10″ |
| Space velocity (relative to the Sun) | 32.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.29). Visible from the whole Northern Hemisphere and south to latitude 60° S. North of latitude 60° N it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1866. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.8 million years.
The Sun seen from there
From a planet around 12 Tri, the Sun would look like a star of magnitude 8.28, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 12200 10.6 light-years
- HIP 10140 12.7 light-years
- 2MASSW J0208236+273740 14.6 light-years
- Bharani 16.3 light-years
- 21 Ari 16.8 light-years
- Lilii Borea 17.0 light-years
- 2MASS J02301551+2704061 18.9 light-years
- HIP 9067 19.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.